<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM (A)
CONDENSED CONSOLIDATED BALANCE SHEETS, CONDENSED CONSOLIDATED STATEMENTS OF
INCOME, AND NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH (B) FORM 10-Q, MARCH 31, 1996
</LEGEND>


<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<EXCHANGE-RATE>                                      1
<CASH>                                          14,705
<SECURITIES>                                    25,922
<RECEIVABLES>                                  111,229
<ALLOWANCES>                                     1,045
<INVENTORY>                                     12,719
<CURRENT-ASSETS>                               212,594
<PP&E>                                         443,101
<DEPRECIATION>                                 258,684
<TOTAL-ASSETS>                                 419,413
<CURRENT-LIABILITIES>                          148,798
<BONDS>                                         39,357
<COMMON>                                           181
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     206,807
<TOTAL-LIABILITY-AND-EQUITY>                   419,413
<SALES>                                        153,749
<TOTAL-REVENUES>                               153,749
<CGS>                                          139,107
<TOTAL-COSTS>                                  154,592
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 941
<INCOME-PRETAX>                                    590
<INCOME-TAX>                                       224
<INCOME-CONTINUING>                                366
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       366
<EPS-PRIMARY>                                     0.02
<EPS-DILUTED>                                     0.02